March 27, 2015, 3:48PM

March 27, 2015, 7:15AM

The partial meltdown at Three Mile Island nuclear power plant in Londonderry Township, near Middletown, Pa., occurred on March 28, 1979. At 4 a.m. that day, Unit 2 had been in service for about three months. Unit 1 was shut down for refueling. By 7:24 a.m. a general emergency was declared. Full story »

March 28, 2014, 7:58AM

Former PA Governor Dick Thornburgh shakes hands with Robert Reid, former Mayor of Middletown during the Three Mile Island Nuclear Crisis in 1979. Both men were attending a conference at Penn State Harrisburg on the 35th anniversary of the TMI accident. Mark Pynes | mpynes@pennlive.com

March 27, 2014, 9:22PM

Former PA Lt. Governor Mark Single was a speaker at the Penn State Harrisburg conference on the 1979 Three Mile Island Nuclear Crisis, held Thursday afternoon on the Middletown, Pa. campus. Mark Pynes | mpynes@pennlive.com

March 27, 2014, 9:22PM

Former Middletown Mayor Robert Reid listens to former PA Governor Dick Thornburgh as he recounts the 1979 Three Mile Island Nuclear Crisis at a conference at Penn State Harrisburg Thursday afternoon in Middletown, Pa. Mark Pynes | mpynes@pennlive.com

March 27, 2014, 9:22PM

Former Pennsylvania First Lady Ginny Thornburgh greets former Middletown Mayor Robert Reid outside the Penn State Harrisburg two-day conference on the 1979 Three Mile Island Nuclear crisis. Reid was mayor at the time and Thornburgh's husband Dick was Governor of Pennsylvania. Mark Pynes | mpynes@pennlive.com

March 27, 2014, 9:22PM

Former PA Governor Dick Thornburgh checks out the crowd before he spoke at a Penn State Harrisburg conference for the 35th anniversary of the 1979 Three Mile Island accident when he was governor. Mark Pynes | mpynes@pennlive.com

March 27, 2014, 6:23PM

An unidentified woman listens to former PA Governor Dick Thornburgh as he recounts the Three Mile Island Nuclear Crisis at a conference at Penn State Harrisburg Thursday afternoon in Middletown, Pa. Mark Pynes | mpynes@pennlive.com

March 27, 2014, 6:23PM

Former PA Governor Dick Thornburgh meets with the media after speaking at a Penn State Harrisburg conference on the 35th anniversary of the Three Mile Island Nuclear Crisis in 1979. Mark Pynes | mpynes@pennlive.com

March 27, 2014, 6:23PM

Former PA Governor Dick Thornburgh shakes hands with Robert Reid, former Mayor of Middletown during the Three Mile Island Nuclear Crisis in 1979. Both men were attending a conference at Penn State Harrisburg on the 35th anniversary of the TMI accident. Mark Pynes | mpynes@pennlive.com